Skip to definition.
Get the FREE one-click dictionary software for Windows or the iPhone/iPad and Android apps


Noun: penicillin  ,pe-ni'si-lin
  1. Any of various antibiotics obtained from Penicillium moulds (or produced synthetically) and used in the treatment of various infections and diseases

Derived forms: penicillins

Type of: antibiotic, antibiotic drug

Encyclopedia: Penicillin